- Numerical Computing with MATLAB (OUR TEXTBOOK by Cleve Moler which can be downloaded for FREE)
- Getting Started in MATLAB (pdf) (some very basic info to get you off the ground)
- A Very Elementary MATLAB Tutorial from The MathWorks
- The MathWorks Student Center (all sorts of useful information)
- Experiments with MATLAB (by Cleve Moler), the textbook for MATH 100 which can be downloaded for FREE.
- MATLAB 7: Getting Started Guide (should also be available directly through your MATLAB installation)
- Learning MATLAB (link to an intro text written by Toby Driscoll)
- MATLAB Webinar: Intro to MATLAB (you need to register for this, but it's free)
- MATLAB Central (File Exchange, Newsgroup, Blogs)
-
Official MATLAB Site -
Octave and 
Scilab, two inexpensive (FREE)
alternatives to MATLAB
Netlib, a collection of
mathematical software, papers, and databases -
Guide to Available Mathematical Software
-
Numerical Recipes, a series of books
with code for Numerical Methods - Some disasters attributable to bad numerical computing collected by Kees Vuik (Technical University of Delft)
- Understanding Mathematics: A Study Guide by Peter Alfeld (University of Utah)
- Programming Style from Wikipedia